Mu Xiang - promotes movement of clumped qi in stomach and intestines - distention and fullness of epigastrium and abdomen along with diarrhea.
Xiang Fu - disperses/spreads stagnant qi in the liver and stomach, best used for problems secondary to emotional constraint, epigastric and hypochondriac distention and pain, menstrual problems.
Wu Yao - warmer and more restricted to cold problems - for pain anywhere in the truck from the genitals to the chest.